Loading...
Polyelectrolyte Complex Nanoparticles for Protection and Delayed Release of Enzymes in Alkaline pH and at Elevated Temperature during Hydraulic Fracturing of Oil Wells
Barati Ghahfarokhi, Reza Johnson, Stephen J. McCool, Stan Green, Don W. Willhite, G. Paul Liang, Jenn-Tai
Barati Ghahfarokhi, Reza
Johnson, Stephen J.
McCool, Stan
Green, Don W.
Willhite, G. Paul
Liang, Jenn-Tai
Citations
Altmetric:
Abstract
Polyethylenimine-dextran sulfate polyelectrolyte complexes (PEC) were used to entrap two enzymes used to degrade polymer gels following hydraulic fracturing of oil wells in order to obtain delayed release and to protect the enzyme from harsh conditions. Degradation, as revealed by reduction in viscoelastic moduli, of borate-crosslinked hydroxypropyl guar gel by commercial enzyme loaded in polyelectrolyte nanoparticles was delayed up to 11 hours, compared to about three hours for equivalent systems where the enzyme mixture was not entrapped. PEC nanoparticles also protected both enzymes from denaturation at elevated temperature and pH.
Description
Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive version is available at www3.interscience.wiley.com
Date
2012
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley-Blackwell
Files
Research Projects
Organizational Units
Journal Issue
Keywords
Gels, Nanoparticles, Enzymes, Polyelectrolytes, Fracturing fluids, Guar, Hydraulic fracture cleanup
Citation
Barati, R., Johnson, S. J., McCool, S., Green, D. W., Willhite, G. P. and Liang, J.-T. (2012), Polyelectrolyte complex nanoparticles for protection and delayed release of enzymes in alkaline pH and at elevated temperature during hydraulic fracturing of oil wells. J. Appl. Polym. Sci.. http://dx.doi.org10.1002/app.36845